| 摘要 |
A machine including an engine cooling system, a secondary system with a low-temperature limit, and a secondary cooling system. A temperature sensor is associated with the secondary cooling system. The temperature sensor senses the secondary cooling system temperature and provides a temperature signal. A control valve has an open position allowing fluid communication between the engine cooling system and the secondary cooling system, and a closed position disallowing fluid communication. A controller receives signals from the secondary system temperature sensor and commands the control valve to open when the secondary cooling system temperature is below the low-temperature limit. |
